Mood: The mood of the video appears to be contemplative and introspective, with a sense of melancholy. The theme seems to revolve around self-reflection, possibly exploring the protagonist's journey of self-discovery or grappling with past mistakes. The overall tone seems somber and thoughtful.

Environment: The setting appears to be a dimly lit, rustic space with a green chalkboard wall covered in mathematical equations and diagrams. The presence of a cushion, books, and a piece of paper with writing on it suggests a quiet, studious atmosphere. The overall setting seems to be a humble, possibly rural or semi-rural, educational or introspective space.